Warp stop-motion for looms.



N. 835,807.. v PATENTED NOV. 13, 1906.

J. T. BOLTON.'-

WARP STOP MOTION POR LOOMS.

APPLIGATION FILED FEB. s. 1905.

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PATENTED NOV. 13.1 1906.

J. T. BOLTON. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED PB. 8. 1905v a SHEETS-SHEET s,

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UNITED STATES 'PATENT OFFICE.

JOHN T. BOLTON, OF FALL RIVER, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO GEORGE GRIME. OF FALL RIVER, MASSACHUSETTS.

WARP STOP-MOTION FOR LOONIS.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed February 8, 1905. Serial No. 244.734.

To all whom, it may concern:

Be it known that I, JOHN T. BOLTON, a resident of the city of Fall River, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Varp Stop-Motions for Looms; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to improvements in stop-motions for looms, and more particularly to that class wherein an electrical current is employed to operate the stop-motion to stop the loom when the circuit is conipleted by the falling of a detector caused by the breaking of one or more warp-threads.

An essential feature of this device is the manner in which the detecting mechanism is supported from the loom-frame, rendering it very readily applied to any of the ordinary looms and providing said mechanism with a great range of adjustability, whereby it may be readily moved and set either between or forward or back of the lease-rods or in any desired position anywhere between the arch and the vibrator.`

The adjustability of this mechanism has many practical advantages. Among others, is that it is easily adapted to different styles of work, and when it is desired to twist in or join the threads of a new warp to the old this vstop device may be readily moved in on its supporting-rods to give good working room for the operation.

lt is found in practice that on account of the special construction of this device that it may be used in the ordinary loom, where each detector-wire is hung on a separate thread, or it may be moved forward of the lease-rods and used with a plurality of threads through each detector, as in the weaving of fabric having a variety of colors.

In other forms of electric warp stop-motions where detector-wires fail to complete the electric connection when a warp-thread breaks it is customary to require a constant contact of these wires with the contact-bar in order tocause the lay to throw off the shipper-lever and stop the loom. It is found in the practical use of these devices that the jar of the rapidly-vibrating lay causes these detector-wires to be thrown from the contactbar and make their contact thereon intermittent, thereby causing the operation of the stopping mechanism to be unreliable. My device has been constructed 'especially to obviate this difficulty, the mechanism being so arranged that it requires but one instantaneous contact to provide a single impulse suHicient to position the knock-off plate, so that by the next forward movement of the lay the shipper will be thrown offto stop the loom. From this it will be seen that it does not require a constant contact or continuous current to' positively operate the stopping mechanism. A further object of this construction is that it requires an extremely small amount of current for this operation, as the current is used only to produce this one impulse and 1s then automatically cut off.

The invention consists of other novel 'features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the appended claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

In the drawings, Figure l is an end elevation representing a portion of the loom in section with my device attached thereto. Fig. 2 isa rear elevation of the loom-frame, showing my device suspended from the loomarch between the end frames. Fig. Sis an enlarged view showing the detector mechanism in detail, being partially in section. Fig. 4 is an end view of the detector mechanism sectioned on line 4 4 of Fig. 3. Fi 5 is a perspective view showing a portion o the two detector-retaining bars and the lock-plate by which said bars are held in position inthe frame. Fig. 6 illustrates the detecting mechanism as located between the lease-rods with a detector-Wire engaging each thread separately. Fig. 7 represents the detector mechanism located forward of the lease-rods, showing each detector-wire as engaging a plurality of threads. Fig. 8 represents one of the detectors as engaging a plurality of 'warpthreads and in a position said detector will take when one thread is coming down and passing another going up. Fig. 9 represents a detail of the shipper-rod and actuating TOO mechanism. Fig. 10 shows an enlarged detail of the 'linger which engages the armature of the magnet to complete the circuit. Fig. 11 is a perspective view representing the knock-oilplate, which is attached to the shippenrod, said plate being shown-in position to be hit by the operating-pin on the lay to throw off the shipper-rod. Fig. 12 is a rear elevation of this knock ofll plate showing the positions in full lines where it will not intercept the knock-oil' pin on the moving lay. Fig. 13 is an enlarged view of the magnet, showing the magnet-box in section and the armature drawn in, allowing the finger to fall and bring the knock-off plate in position to be acted on by the knock-off pin in the lay. Fig. 14 shows this linger as resting on the end of the armature. Fig. 15 is a detailed view of the adjustable collar on the horizontal rods in which the depending rods 7 are adjustably held,

Referring to the drawings, at 1 1 are the usual end frames of the loom, and 2 is the arch supported thereon, Extending out rearwardly and horizontally from this arch are the two parallel supporting-bars 3 and 4. Only one of these bars (bar 4) is insulated from the arch where it engages the same at 5, bar 3 connecting direct to said arch. Adiustably held by set-'screws on each of these bars are the collars 6 6, and vertically adjustable in these collars are the depending rods 7 7, to the lower en d of which rods the detecting mechanism is connected. This detector mechanism is an entirely separate device Jfrom the loom and may be hung on either side or between the lease-rods 19 19. The device is made up of the two end plates 8 8, held at their top ends by the stay-rod 9, over which the warp-threads 18 are led as they pass from the vibrator to the harnesses. Each of the plates are engaged by jam nuts onthe rod, the outer nut 11 at one end being of a special form to receive one of the depending rods 7, which rod is held therein by a setscrew 11a. These plates are slotted at their lower ends and are supported or held apart by the contact-bar 10. This bar is held to be vertically adjustable in these slots and is. nsulated'from the two end frames 8 8 by the insulations 8a; but said bar is connected by the bolt 12 through to the outer plate 13, which plate serves as a conductor from the depending rod 7 through the special head 14, in which it is bound by the set-screw 14a.

At 15 15 are the two detector-retaining bars, that are arranged one on each side of the frame, on each of which bars the detectorwires 16 are hung, forming two banks of the same. These bars are held in slots in the end plates 8 8, designed to receive them, and are locked in position insaid plates by means of the lock plate 16a, that engages suitable notches 17 17 in saidplates. When it is desired to unlock said bars for the purpose of removing thedetector-wires, the nut 18a is turned back, the lock-plate 16, which fits loosely on the rod, is raised out of the notches 17 17, (see Fig. 5,) and the bars may then be readily removed.

In order to keep the contact-bar 10 free from dust or dirt to insure a positive contact of the detector-wires when they fall against the same, the ring 47, which is mounted loosely on this bar, has been provided. This ring may be thrown back and forth across the bar at intervals by hand to remove any dust or dirt that may have collected on the said bar, or the said ring might be operated automatically, if desired.

Supported on a bracket 20, that is connected to the frame 1 near the forward end of the loom, is the electromagnet 21, that is insulated from said bracket by the insulat ing-block 22. At one end of this magnet is the armature 23, pivoted at 24, so that of its own weight it will fall back and normally rest against its stop-screw 25 in the position shown in Fig. 14. This magnet and armature are covered by a casing 26. Through the top of this casi-ng is a hole 27, directly over the top end 28 of said armature 23 when said armature is in its normal position. This hole is preferably made tapering, as shown, being larger at the top to allow a lateral movement of the linger, which works therein. Connected to the shipper-lever 29 by the clamp 30 and clamp-screws 31 is the knockoil plate 32. (See Figs. 11 and 12.) This knock-off plate is pivotally hung at 33 on the said clamp-plates 30 and is provided with a downwardly-curved nose-piece 34 on one side, which nose-piece raises the opposite side of the plate when it engages the lug 38 on the frame. Ears 35 are formed on the opposite side of this plate, to which ears are pivotally connected the downwardly-extending rod 36. On the lower end of' this rod is adjustably held the finger 37, which linger enters the hole 27 in the casing 26 andv rests on the end 28 of the armature when said armature is back in its normal position.

The operation of the device may be further described as follows: By my special construction olf the detector mechanism it is made a separate device and constructed independent of the loom and may be attached thereto in any convenient way; but I prefer to suspend it from the horizontal bars 3 and 4. By connecting this device to the loomframe in this manner it may be adjusted either backward or forward and up or down and is most easily connected and disconnected and is very easily applied to any loom. When the device is used on the ordinary loom, it is preferred to suspend the same between the lease-rods 19-19 and hang a detector-wire on each warp-thread, as illustrated in Figs. 1 and 6. On account of the special construction and adjustability of this devicegit may also be used in looms weaving lOO fancy goods of a variety of colors by moving the same forward of the lease-rods and passing a plurality of threads through each wire instead of one, as illustrated in Figs. 7 and 8. When two or more threads are passed through the same wire, the said wire is held suspended continually either on one thread or the other until one breaks. For instance, two threads are through thesame wire. Thread No. 1 is rising and carries the wire with it. Thread No. 1 commences to descend. Thread No.2 starts to rise. They pass each other half-way up, where No. 2 engages the wire and carries it up again and back to the half-way position, (see Fig. 8,) when it is again engaged by the rising N o. 1 thread, and so it continues, never being allowed to drop until one of the said threads breaks, when it is carried way down on the whole thread, makes the connection on the contact-bar 10 below, and stops the loom. Any desired number of threads may be used in each wire in this manner.

Vhen it is desired to start the loom, the warp-threads are repaired and all of the wires raised out of contact with the contactbar. The shipper-handle is set in the position illustrated in dotted lilies in Fig. 9, and when in this position the end of the finger 37 rests on the end 28 of the armature 23 (see Fig. 14) and through the rod 36 holds the pivoted knock-off plate 32 up in the position illustrated in Fig. 12, out of the path of the knock-ofi pin 45, that is located on the reciprocating lay 46.

The current comes to the machine from the generator 39 through the wire 40, which is connected beneath the iioor t0 the upright conductor-rod 41.' The upper endl of this upright rod is electrically connected to the supporting-rod 4 by the horizontal rod 42 and the collars 43 and 44. The current thennds a path down through the depending rod 7, head 14, plate 13, and bolt 12 into the contact-bar 10.

When one of the detector-wires falls, it naturally rests on this bar 10 the circuit up through the bar 15, nut 11, rods 7 and 3 to the frame of the loom. The current immediately passes through the frame and energizes the electromagnet 21, instantly drawing the armature 23 from under the finger 27, allowing it to fall and through the rod 36 brings the knock-ofi` plateinto the path of the knock-off pin 45, as illustrated in Fig. 11, and at the neXt forward motion of the lay the shipper-lever is released and springs back into the position illustrated in full lines in Fig. 9, immediately stopping the loom. It will be noted that when this lever moves to the position last mentioned the nose-piece 34 on the knockofl' plate engages the boss 38 on the loomi'rame and raises the said finger 37 up out of the way, so that when said armature 23 falls and completes back after the current is broken no connection will be made, and thus the -current is instantly and automatically shut ofi", only having been used for an instant to withdraw the larmature from under the iinger.

Another feature of this arrangement is that there are no wires in sight, making it practically impossible for a dishonest operator to break the electrical connection, and so destroy the elioiency of the stop-motion.

I-Iaving thus described my invention, what I claim as new, and desire to secure .by Letters Patent, is

1. In an electrically-operated stop-motion for looms, a detecting device suspended independent of the end frames, and means by which said device may be adjusted both up and down and backward and forward between said frames.

2. In an electrically-operated stop-motion for looms, a pair of rods extending out horizontally from the loom-arch, a detecting device suspended from said rods to hang between the end frames of the loom, and means whereby said device may be adjusted both horizontally and vertically between said frames. n

3. In an electrically-operated stop-motion for looms, a detecting device composed of two end plates slotted at their lower ends, a binding-rod at the upper end of said plates, retaining-bars for holding two banks of detector-wires, and a contact-bar adjustably held in the said slotted end plates and insulated from said plates.

4. In an electrically-operated stop-motion for looms, a detecting device, means by which said device may be universally adjusted between said frames, said detecting device being composed of two end plates slotted at their lower ends, a binding-rod at the upper end of said plates, retaining-bars for holding two banks of detector-wires, and a contactbar adjustably held in the said slotted end plates below said retaining-bars and insulated from said plates.

5. In an electrically-operated Stop-motion for looms, a detecting device composed of two end plates slotted at their lower ends, a binding-rod at the upper end of said plates, retaining-bars for holding two banks of detector-wires, means for locking said bars in place in said frame, a contact-bar adjustablyheld in the said slotted end plates and insulated from said plates and means on said contact-bar whereby the same may be cleaned to insure a contact ofthe drop-wires.

6. In an electrically-operated stop-motion for looms, a detecting device suspended independent of the end frames, means by which said device may be adjusted between said frames, said detecting device being composed of two endlplates slotted at their lower ends, a binding-rod at the upper end of said plates, retaining-bars for holding two banks of de- IOO IVs

- tion for looms, a detecting device suspended tector-wires, and a contact-bar adjustably held in the said slotted end plates below said retaining-bars and insulated from said plates.

7. In an electrically-operated stop-motion for looms the combination of a detector device, means in said device for automatically completing the circuit when a warp-thread breaks, a shipper-lever, and means whereby y said shipper-lever will be automatically i thrown ofll to stop the loom and then automatically cut ofi' the supply of current on one instantaneous completion of the circuit in the detector mechanism.

8. In an electrically-operated stop-motion for looms, a detecting device suspended between the end frames, means by which said device may be adjusted both up and down and backward and forward between said frames, means in said device for automatically completing the circuit when a warpthread breaks, a shipper-lever, and means whereby said shipper-lever will be automatically thrown Aoff to stop the loom and then automatically cut off the supply of current on one instantaneous completion of the circuit in the detector mechanism.

Q. In an electrically-operated stop-motion for looms the combination of a detector device, means in said device for automatically completing the circuit when a warp-thread breaks, a. shipper-lever, means whereby said shipper-lever will be automatically thrown off to stop the loom on one instantaneous completion of the circuit in the detector mechanism, and means operated by the movement of said lever for breaking the circuit when the lever is thrown off.

10. In an electrically-operated stop-motion for looms, the combination of a detector device, means in said device for automatically completing the circuit when a warpthread breaks, a shipper-lever, a knock-off plate pivotally held on said lever arranged to fall into position by gravity at thecompletion of the circuit so that said plate will be engaged to knock off the lever on the next forward movement of the lay, and mechanical means operated by the movement of said lever whereby said pivoted plate will be raised and break the circuit when the lever is thrown to its stop position.

11. In an electrically-operated stop-moindependent ol" the end frames, means by which said device may be adjusted both up and down and backward and forward between said frames, means in saidv device for automatically completing the circuit when a warp-thread breaks, a shipper-lever, means 1 on said lever positioned by the completion of the circuit so that said lever will be knocked off on the next forward movement of the lay, and means operated by the movement of said lever for breaking the circuit when the lever is thrown to its stop position.

12. In an electrically-operated stop-motion for looms, the combination of a detector device, means in said device for automatically completing the circuit when a warpthread breaks, an electromagnet, an armature to said magnet, -a shipper-lever, a knocko'lf plate pivotally held on said. lever, a support resting on said armature to hold said plate out of the path of the knock-off pin on the lay, and means whereby said armature is withdrawn from under said support to allow the plate to fall into the path of the knocko'ff pin when. said magnet is energized.

13. In an electrically-operated stop-inotion for looms, the combination of a detector device, means in said device for automatically completing the circuit when a warpthread breaks, a shipper-lever, a knock-off plate pivotally held on said lever positioned by the completion of the circuit so that said plate will be engaged to knock oil' the lever on the next forward movement of the lay, and means operated by the movement of said lever for breaking the circuit when the lever is thrown to its stop position.

14. In an electrically-operated stop-motion 'for looms, a detecting device, means by which said device may be universally adjusted between said frames, said detecting device being composed of two end. plates slotted at their lower ends, a binding-rod at the upper end of said plates, retaining-bars for holding two banks of detector-wires, a contact-bar adjustably held in the said slotted end plates below said retaining-bars and insulated from said plates, an electromagnet, an armature to said magnet, a shipper-lever, a knock-oil plate pivotally held on said lever, asupport resting on said armature to hold said plate out of the path of the knock-oil' pin on the lay, means whereby said armature is withdrawn from under said support to allow the plate to fall into the path of the knock-olf pin when said. magnet is energized, and means operated by the movement of said lever for breaking the circuitwhen the lever is thrown to its stop position.

15. In an electrically-operated stop-inotion for looms, a detecting device suspended from the loom-arch. between the end frames, and means by which said device may be adjusted botli up and down and backward and forward between said frames. f

In testimony whereof I have hereunto set my` hand this 4th day of February, A. D. I905.

JOHN T. BOLTON.

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